Drying apparatus.



- K. GAMMEL. DRYING APPARATUS. Arrmonmn nun ma; 23, 1907.

Patented Aug. 31,1909.

I KARL GAMMEL, OF STUTTGART, GERMANY.

DRYING- APPARATUS.

Specifieation oi Iietters Patent.

PatentedAug. 31, 1909:

Application filed February a; 19in. Serial No. 359,009..

To all whom it may concern: v A

Be it known that I, IARL GAMMEL, a citizen of the German Empire, residingat Stuttgart, in the Kingdom of lviirtemberg,

Empire of Germany, have invented certain new and useful Improvements in Drying- Apparatus; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as will enable others skilled in the art-to which it appertains to make and use the same,

Several processes are already known in which the material to be dried is dried in closed cases or containers on stages or shelves 1 or in suitable boxes, and a constant air current being caused to flow forwardand upwardly through thematerial to be dried by' means of a fan, or even by the movement of pistons.

The object of this invention is to provide a drying apparatus of simple, durable and strong construction, effective in operation, and easily handled.

The invention consists inthe improv'ed drying apparatus, in the means for producing a whirling or gyratory' movement of the air to be used for drying, and forcing the air in that condition through the material to be dried, and in the combination and arrangement of the various parts thereof, substantially as will be hereinafter more fully described and finally embodied in the clauses of the claim.

Referring to the accompanying drawings, in which like numerals of reference indicate corresponding parts in each of the figures: Figures 1 and 2 are respectively a cross sectional and a longitudinal sectional view of my improved apparatus.

The drawing shows an air tight case 1 which is provided with a door 2 through which the case 1 is fed with the material to be dried. The case is divided by means of one or more removable partitions 3 into separate chambers 10 and 11, while stages or shelves 4 are arranged one above the other within said chamber, as clearly shown.

Beneath the lowest layer of shelves, a wing or fly 5, adapted to be oscillated on shaft 6 by any suitable means, is provided in the chamber 7 which latter is formed by the lower part of case- 1. By the oscillating movement of the 151 or wing 5,'the air con-. tained in the chamber 7 on both sides of the wing 5 has a varying motion imparted/co it, so that the two air currents within the drying chamber encounter one another-at the most, varying places, and a gyration or whirling of the'air is produced, as will be hereinafter more fully described.

On one side of chamber 7 is arranged an air inlet provided with the stop cock 12 \and a valve'fiap 8 (opening inwardly), while on the other side is arranged an air outlet, provided with the stop cock13 and avalve flap 55 9 (opening outwardly) 'A pipe 15 is likewise arranged in the case 1 below the. air outlet, to be connected with-an air pump,

should the drying be carried on under vacuum, as hereinafter described. Supposing 74) the win 5 is at its extreme left-hand position and is being moved from the latterin the direction of the arrowfto its extreme right-hand position. By means of this movement the flap 8 is opened and fresh air 7 is being sucked or taken in through cock iii-into chamber 7 (on the left of wing 5), where it intermingles with the air coming from chamber 11, and through said inter minglingor mixing a whirling ,or gyratory movement is imparted to the said fresh air mixture. Simultaneously the flap 9 is opened, and the damp air in chamber 7 (on the right of wing 5) is discharged through rock 3, although a small portion of said damp air is again forced through the material to be dried. ()n the return movement of wing 5, the fresh air mixture now filling the entire chamber 7, and which air mixture is in a whirling or gyratory movement, is forced through chambers 11 and 10, where it dries the material contained in said chambers. It will be understood that during the return movement of wing 5 (from right to left) both flaps 8 and 9 are closed.

If the drying is to be carried on under "vacuum, the two cocks 12 and 13 are closed and air and moisture are withdrawn from the drying chamber by means of an air pump to be attached to pipe 15. By means "of said air pump, steam is also withdrawn from the chamber, and the degree. of moisture and the vacuum may be'suitably regulated in the manner te'rial to be dried.

The necessary heat for evaporating the Water contained in the material to be dried, 'is partly produced in the drying cases by the frictional resistance of the air itself, and also heat appliances 14, of any suitable con- 110 struction may be provided in the walls of the drying case, for instance in the chamber preferable for the ma- Land may be provided with any suitable opening and a valved outlet opening for thc means for regulating the heat. chamber and a wing movable back and forth What I claim as new and desire tolsecure alternately toward each compartment, subby Letters Patent is: stantially as described.

5 1. In a drying a paratus, the combination, 4. In a drying apparatus, the combination 5 with the drying c amber having inlet and of the drying chamber, a wall dividin the "outlet openings, of means for efiecting' a same into separate compartments and aiIordreciprocating but general advancing moveing relatively limited communication bement of the drying fluid through said chamtween said compartments, a valved inlet 10 ber, substantially as described. opening and a valved outlet opening for the 30 2. In a drying apparatus, the combination, chamber and an oscillatory wing arranged with the drying chamber, of means for caus in said chamber and having its axis of moveing the drying fluid to be advanced in said ment substantially in the plane of said Wall,

chamber and t'o'simultaneously reciprocate,- substantially as described.

15 substantially as described. In testimony whereof I afiix my signature 35 v 3. In a dryin apparatus, the combination in presence of two witnesses. V of the drying cIiamber, a Wall dividin the KARL GAMMEL. same into separate compartments and a ordlVitnesses: ing relatively limited communication be- HERMANN Home,

20 tween said compartments, a valved inlet ERNEST EN'rnNMANN. 

